Weight indicating support



-May 31,1932. A. M. BEVIER I WEIGHT INDICATING SUPPORT Filed Nov. 24, 1930 2 Sheets-Sheet l' Patented May 31, 1932.

r ABRAM ME-BEVIER, oFmULUTE- -MINNEsoTA- WEIGHT INDICATING- SUPPORT Application filed- November 24, 1930.- Serial No. 497,831.

This invention relates to weight indicating supports and has speciarreferenee ton. block like connection for attachment to 'the endoii a "hdisti'ngiiline usedin' the art-of drilling! u The principal'obj'ect of the invention'is' to produce a-simple and efiicient unit for-in:

stallationwithinia pulling Vjorhoisting line whereb" {j to automatically %-indicate the relativewerghtjbrstress upon'the line;

1 Another "objectis to pr'ovidesirnple means wherebfthe indicaton'may be set when a redetermined: weightof the material beingsuspended is 'kno'wng'sothtt the device indi-' cate's' theproportional'weightor stress on the object contacted thus avoiding the necessity ofrelative' calculations" were" a common weighing scaleused. a

Other advantages "of the novel construction wi ll' appe r in the further description thereof? Refrerring now td theaecompan ing draw: ing's; formi ng art of this application; and

wherein like reference charactersindicate likeparts'i F igurel is a rear elevation of an indicator unit embodying-the invention Figure 2 is a top plan view of same; Figure 3 is a section on the line 33, Figure 4, partly broken away and partly in elevation; and v Figure 4 is an elevation of the pointer operating mechanism, partly broken away for convenience of illustration. Figure 5 is a guide chart for the marking of the dial and use of difierent springs in the weight indicator when drilling at different predetermined depths.

The unit comprises a normally vertically disposed open link like structure indicated at 1, of sufiicient strength to withstand the necessary stress imparted by the Weight of the load carried, and divided into two open spaces 2 and 3 by the transverse wall 4. 1 The lower portion of the link has a laterally projecting circularly shaped housing 5 fixed thereto in any desired manner, and which housing terminates upon its free face .with an enlarged annular extension 6 into which is'fitted the indicator dial 7, and on "the back of which dial is attached themech- V anismfor operating the pointer ofthe dial; whichwill be hereinafter "describedff' Central'ly'of the sp'aces2 3 oftlielink" l is recip'ioc'ably inountedthe bo'lt 8 haying its bearings 9 and10'in the divisionwjvall and the lower transversfwall' of the'linlg respectively this bolt terin'inati'n'g'ina suit able 11001511 for 'attacli'i'nent"as in' this in stance to therotaryflr'ill rods of a drilling machine, not shown; This 'bol't' issui'tablyf 0 splined for reception of the gib key indi catedat l2 inthedower beai irig'ltl to'pre- Vent the hook from: swiveling in the link, 1: and'while' forcon'v'enie'nce of 'illustrationl' have shown the key at-riglit "angles'to its" preferred position, the hoOk'is designed to extend transverse 'thelink' 1. About the bolt orshanks eithe -11051111 and witliimthe space 3 is mounted the ex pansiv'e'hel'ic'al spring 13 which is surmount ed by the"circumferentially grooved disc 14:; the latterbeingthreaded thereupon and 'fiXed as by a s'uitable' pin orkey to tlie'rod, so that when" stress occurs, as for" example by .a

weight'attached to the {hook betweii'it and the bigl'it 15 er the -1ink',"an'y' 'i'eciproc'ation of'the rodS witlii'n'the linl'i will cause the disc 14 to similarly-erai'seor fallj itbeingZI un'c'lerstood' that the proper "strength ofspr'ihg'is predetermined inu'espectto the maximum load to be carried rThevertical nioti iiof the'disc" 141 is whate operates the indicating mechanism, and comprises a vertically' t recipro'cable" rack l6 mounted within suitable bearingsrlfi -and'-18 carriedby tlie'brackcts'li ttIltlQOyfiKBd to the" backofthedial'q.

The rack '16 7 carries upon its up'fierinost end thejradial'l yextending arm 21, the free end of which is engaged within 'the gro'o've' 22- of 'the disc 14 so that as "the-latter "is" raised or lowei-e'tb the rack l6* -is similarly-' alfc'ted; andg it being dogged or game upon one face' as at 23 is inade to rotate thepim'f ion"-24 "onthe* shaft 255 The bra'cke'ts 1-9 aridQO tarr intermediate their imaermost ends the "upright tearing-member QG which' forms the innei'iifost s upport foi the shaft and whereat are located suitable bearings as at 27 and 28, respectively.

It will be noted by viewing Figure 2 of the drawings that the rack 16 is offset somewhat in respect to a central line through the housing 5 from the center of the link 1, thus permitting of a larger spur gear 29 being installed upon the shaft 25 and meshing with the smaller driven gear 30 on the dial shaft 31 so that when motion is imparted to the shaft 25 it will be transmitted and materially augmented by this chain of gears and rack, resulting, comparatively, in the slightest vertical motion of the bolt 8 being transmitted to the dial shaft and materially rotating same.

Now on this dial shaft and outwardly of the face of the dial is fixed the jam ring 31, outwardly of which and loosely mounted on the shaft is the hub 32 of the pointer 33.

For holding this pointer in any predetermined position on the shaft there is provided the wing nut 34 so that the pointer may be set at any desired position in respect to the dial, the objectof which will be described later.

As a simple means for steadying the action I of the dial shaft I have provided the flat helical spring 35 one end of which is wound about the shaft 31, and the other end as at 36 attached to the pin 37 fixed to the back of the dial 7, it tending at all times to return the pointer to zero.

It is to be understood that the face of the dial 38 is left blank, that is without any figures or lines thereon, except'possibly equidistant radial lines dividing the circle into four equal parts, one line being vertical and the other horizontal, and that the position of the pointer when under the stress of varying weights be marked upon the dial so that the relative weight on the cutting end of the drill may be readily determined by the osition of the pointer; it having previously een fixed upon the shaft in accordance with the following procedure:

For example, in ordinary drilling it is desirable to have no more than approximately five hundredpounds weight on'the shot. Assuming then that drilling has proceeded to a point where the total weight of the rods approximates five hundredpounds and it is essential to add another length of rod to continue drilling. The rods are then lifted free from. the bottom of the hole and the pointer on the dial fixed in its vertical position by means of the wing nut 34 and this position marked on the dial. The additional length of rod, weighing approximately one hundred pounds,.is then added,.and the rods again lifted free and the position of the pointer thus afi'ected marked on the dial, such mark indicating, of course, onlythe weight of the section added, so that when the rods are lowered until they engage the bottom of the hole and stress gradually released until the pointer returns to its vertical osition, it is obvious that only five hun red pounds weight will yet be in suspension, and that if the desired five hundred pounds is to be on the bit, the lifting stress is further released until the ointer so indicates; thus the pointer indlcates the proportion of the total weight that is actually on the cutting bit.

It is further apparent from the indicia on the dial, illustrated in Figure 5, that at different predetermined depths different strengthenedsprings, as indicated at 13, are used, or any desired grouping of same, to compensate for the variation in weight of the tools used, and which, of course, would require different spacing of the radiallines, as indicated.

Having thus described my invention, what I claim and desire to secure by Letters Patent, is:

1. A weight indicator of the class described comprising a vertically disposed link, a vertically 'reciprocable spring controlled hook within the link, a housing upon one side of the link, a dial and pointer exshankof the hook, and motion imparting means above the spring withinthe link and attached to the shank'of the hook, a dial and pointer carried by the link, and means for operating'the pointer directly connected with said mot-ion imparting means.

In testimony whereof I affix my signature.

ABRAM M. BEVIER. 

